Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Beaver Dam, WI

1 2 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
920-210 A MILWWI12ZMD  6274 UNITED STATES CELLULAR - WI 356      
920-219 A MILXWIILCMD  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356      
920-219 0   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356      
920-219 1   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356      
920-219 2   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356      
920-219 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 356   2024-09-23   
920-219 4   792K CHARTER IP ENABLED SERVICES, LLC 356   2010-09-05   
920-219 6   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356   2025-09-04   
920-219 8   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356   2024-12-05   
920-219 9   792K CHARTER IP ENABLED SERVICES, LLC 356   2007-05-11   
920-296 A MILWWI12ZMD  6274 UNITED STATES CELLULAR - WI 356      
920-306 A MILXWIILCMD  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356      
920-306 0   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356      
920-306 1   007F BANDWIDTH.COM CLEC, LLC - WI 356   2010-11-20   
920-306 2   007F BANDWIDTH.COM CLEC, LLC - WI 356   2014-04-11   
920-306 3   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356      
920-306 4   007F BANDWIDTH.COM CLEC, LLC - WI 356   2015-04-12   
920-306 5   007F BANDWIDTH.COM CLEC, LLC - WI 356   2016-07-21   
920-306 6   225C ONVOY, LLC - WI 356   2021-04-05   
920-306 7   508J CENTURYLINK COMMUNICATIONS, LLC 356   2014-12-05   
920-306 8   073H TELNYX LLC 356   2017-03-14   
920-306 9   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356      
920-317 A MILWWI12X7X  9748 AMERICAN MESSAGING SERVICES, LLC 356      
920-318 A PEWTWICI7MD  6529 T-MOBILE USA, INC. 356      
920-318 0   5562 METROPCS, INC. 356      
920-318 1   5562 METROPCS, INC. 356      
920-318 2   5562 METROPCS, INC. 356      
920-318 3   6529 T-MOBILE USA, INC. 356      
920-318 4   6529 T-MOBILE USA, INC. 356      
920-318 5   6529 T-MOBILE USA, INC. 356      
920-318 6   6529 T-MOBILE USA, INC. 356      
920-318 7   5562 METROPCS, INC. 356      
920-318 8   145J TERRA NOVA TELECOM INC. 356   2024-08-12   
920-318 9   6529 T-MOBILE USA, INC. 356      
920-319 A MILXWIJIGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 356      
920-319 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 356      
920-319 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 356      
920-319 2   6274 UNITED STATES CELLULAR - WI 356   2005-08-05   
920-319 3   007F BANDWIDTH.COM CLEC, LLC - WI 356   2010-03-04   
920-319 4   5489 LEVEL 3 COMMUNICATIONS, LLC - WI 356   2004-07-16   
920-319 5   007F BANDWIDTH.COM CLEC, LLC - WI 356   2008-11-22   
920-319 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 356      
920-319 7   5489 LEVEL 3 COMMUNICATIONS, LLC - WI 356   2014-10-24   
920-319 8   5489 LEVEL 3 COMMUNICATIONS, LLC - WI 356   2005-12-17   
920-319 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 356      
920-344 A MILXWIILCMD  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356      
920-356 A BVDMWI01DSA  9327 WISCONSIN BELL INC 356      
920-356 0   9327 WISCONSIN BELL INC 356      
920-356 1   9327 WISCONSIN BELL INC 356      
920-356 2   9327 WISCONSIN BELL INC 356      
920-356 5   792K CHARTER IP ENABLED SERVICES, LLC 356   2016-07-12   
920-356 6   9327 WISCONSIN BELL INC 356      
920-356 7   965H FRACTEL, LLC 356   2020-03-19   
920-356 8   9327 WISCONSIN BELL INC 356      
920-356 9   9327 WISCONSIN BELL INC 356      
920-382 A MILWWI12ZMD  6274 UNITED STATES CELLULAR - WI 356      
920-392 A MILXWIILCMD  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356      
920-392 0   145J TERRA NOVA TELECOM INC. 356   2025-11-27   
920-392 1   145J TERRA NOVA TELECOM INC. 356   2025-04-09   
920-392 2   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356   2010-06-18   
920-392 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 356   2007-02-07   
920-392 4   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356   2010-11-05   
920-392 5   227F PEERLESS NETWORK OF WISCONSIN, LLC - WI 356   2013-05-05   
920-392 6   6274 UNITED STATES CELLULAR - WI 356   2011-05-24   
920-392 7   227F PEERLESS NETWORK OF WISCONSIN, LLC - WI 356   2013-05-05   
920-392 9   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356   2008-08-02   
920-557 A MILWWIHEVMD  7216 TELEPORT COMMUNICATIONS AMERICA, LLC WI 356      
920-557 0   007F BANDWIDTH.COM CLEC, LLC - WI 356   2021-11-28   
920-557 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 356   2011-10-07   
920-557 2   225C ONVOY, LLC - WI 356   2016-03-25   
920-557 3   225C ONVOY, LLC - WI 356   2016-03-25   
920-557 4   227F PEERLESS NETWORK OF WISCONSIN, LLC - WI 356   2018-12-29   
920-557 6   7216 TELEPORT COMMUNICATIONS AMERICA, LLC WI 356   2010-04-23   
920-557 7   225C ONVOY, LLC - WI 356   2021-04-05   
920-557 8   225C ONVOY, LLC - WI 356   2021-04-05   
920-557 9   007F BANDWIDTH.COM CLEC, LLC - WI 356   2021-11-28   
920-631 A MILWWIHEWMD  516C AT&T CORP. 356      
920-631 0   939H COMMIO, LLC 356   2022-08-22   
920-631 1   007F BANDWIDTH.COM CLEC, LLC - WI 356   2022-03-10   
920-631 2   227F PEERLESS NETWORK OF WISCONSIN, LLC - WI 356   2020-05-31   
920-631 3   624H ONVOY SPECTRUM, LLC 356   2021-06-25   
920-631 4   007F BANDWIDTH.COM CLEC, LLC - WI 356   2022-03-10   
920-631 5   225C ONVOY, LLC - WI 356   2023-08-14   
920-631 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 356   2025-07-26   
920-631 7   516C AT&T CORP. 356   2010-02-13   
920-631 8   225C ONVOY, LLC - WI 356   2023-08-14   
920-631 9   225C ONVOY, LLC - WI 356   2023-08-14   
920-763 A MILXWIIXDS0  7322 LEVEL 3 TELECOM OF WISCONSIN, LP - WI 356      
920-763 0   7322 LEVEL 3 TELECOM OF WISCONSIN, LP - WI 356      
920-763 2   6274 UNITED STATES CELLULAR - WI 356   2004-10-29   
920-763 3   6274 UNITED STATES CELLULAR - WI 356   2004-10-29   
920-763 4   6274 UNITED STATES CELLULAR - WI 356   2004-10-29   
920-763 5   6274 UNITED STATES CELLULAR - WI 356   2004-10-29   
920-763 6   6274 UNITED STATES CELLULAR - WI 356   2012-07-05   
920-763 7   6274 UNITED STATES CELLULAR - WI 356   2012-10-26   
920-763 9   197D VONAGE AMERICA LLC 356   2022-07-10   
920-791 A PEWTWICI7MD  6529 T-MOBILE USA, INC. 356      
920-791 0   6529 T-MOBILE USA, INC. 356      
920-791 1   6529 T-MOBILE USA, INC. 356   2011-05-20   
920-791 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 356   2020-04-18   

1 2 >>

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.